Computer Networking
A protocol is a set of rules governing a time sequence of events that must take place

between an interface
across an interface
between peers
None of these
between modems

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Computer Networking
A WATS arrangement

is always less expensive than flat-rate service
is never less expensive than flat-rate service
None of these
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

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